NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days — NPA 405
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 405-401 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
— 405-406 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 OKLA CITY OK
— 405-408 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-409 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-410 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 405-412 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-413 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-414 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-415 5XXX6XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 OKLA CITY OK
— 405-416 0XXX3XXX4XXX5XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 OKLA CITY OK
— 405-417 none assigned yet which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-418 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BRITTON OK
— 405-419 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-422 0XXX5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL RENO OK
— 405-424 8XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-425 9XXX which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-426 0XXX2XXX5XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-427 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-433 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CASHION OK
— 405-440 3XXX which blocks → SOUTHWESTERN BELL 9533 BETHANY OK
— 405-444 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 PAULS VLY OK
— 405-447 5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 NORMAN OK
— 405-448 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICKASHA OK
— 405-449 0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 WAYNE OK
— 405-452 0XXX2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WETUMKA OK
— 405-453 0XXX2XXX5XXX8XXX · 4 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 VERDEN OK
— 405-454 0XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HARRAH OK
— 405-455 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MIDWEST CY OK
— 405-457 not yet reported which blocks → HINTON TEL. CO. OF HINTON OK, INC. 1995 LOOKEBA OK
— 405-459 0XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 POCASSET OK
— 405-460 not yet reported which blocks → SOUTHWESTERN BELL 9533 OKLA CITY OK
— 405-462 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 BRADLEY OK
— 405-463 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J BRITTON OK
— 405-466 0XXX5XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 GUTHRIE OK
— 405-469 not yet reported which blocks → CHICKASAW TEL. CO. 1980 ROSEDALE OK
— 405-470 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J BETHANY OK
— 405-471 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EDMOND OK
— 405-472 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-473 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-474 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-475 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-476 not yet reported which blocks → T-MOBILE USA, INC. 6529 OKLA CITY OK
— 405-478 not yet reported which blocks → SOUTHWESTERN BELL 9533 BRITTON OK
— 405-483 0XXX1XXX2XXX3XXX8XXX9XXX · 6 holders which blocks → OKLAHOMA COMMUNICATION SYSTEM, INC. 1984 UNION CITY OK
— 405-484 not yet reported which blocks → CHICKASAW TEL. CO. 1980 PAOLI OK
— 405-485 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 BLANCHARD OK
— 405-488 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J OKLA CITY OK
— 405-489 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 CEMENT OK
— 405-491 3XXX4XXX5XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BETHANY OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.